Migrate remaining `flutter_tools` templates & `widget_preview_scaffold` to `[material|cupertino]_ui` - #193099

Sep 21, 2026

Migrate remaining `flutter_tools` templates & `widget_preview_scaffold` to `[material|cupertino]_ui`#193099
auto-submit[bot] merged 1 commit into
flutter:masterfrom
Piinks:depDesign-4

Migrate M+C deprecation blockeres